Eyup Chaps!
i have a query! id not normaly trouble you with RX-8 issues and keep them to the rx8 oc .... however im not dumb to the fact that you guys over here are significantly more technicaly gifted and have a experiece with modding rotarys older than i am :Thumbs-up
so here goes ... im no stranger to rebuilding 13b\'s ive 2 on the go at the min and have done a couple of others - a week ago however i built my own, the plan all along was to try out a little porting and see if i could manage it :D! things became a little more ugent however when my rear stationary gear slipped 2 weeks ago tomorrow :(
fortunatly the rotors were ready and the engine was just waiting to be assembled finaly last sunday after fixing a petrol leak (nicked a seal :Hammer) i fired he up and have spent the last 6 days running her in at 4k and below ... today i hit the 500 mile mark and had planned an oil change at this interval - unable to wait i nipped out and began creeping her up gentally to 5k rpm (planning in staying at this for the next 500 miles before 6k etc etc)
so ive hit a slight hiccup - litteraly!
after 4k she spluttered a little under load - more aparent up hill less down, a few gental trips up to the 4.5k mark to try to pinpoint the problem (different throttlw positions, incline, decline etc) it went away ... or got better and better would be a better way of putting it - and now the same problem between 4.5k and 5k no worse but doesnt seem to be softerning up now!
ill try describe it as best i can .... its like hitting the limiter ... but it letting you through - so not quite cutting fuel completly but a little bit! a bit of a splutter - like you\'ve come off the throttle toutch for a moment then puting iback on - enough for a pop pop pop but not a bang (ive gto a reacing header, decat and catback on)
now - i have a whole number of possible reasons in my head! so ill talk you through the physical aspects of what it might be first - the header is new! tho there are others 8s with the same 1 on so i think it unlikly that this is the problem! the exhasut has a slight blow between the header and decat (perhaps causing dogy lambda readings?) ive used the racing beet light street mod porting templates and opened the ports at a 45 degree angle to save any risk of hitting or nearly hitting the water jackets - i wondered if they had opened up too much but figured if this was the problem it would be more aparent lower rpm
k+n highflow filter panel - no problems before
also im running the stock Map - i realise this might sound a little daft - which kinda brings me onto my next point - directed at carl hayward (hopefully he\'ll reed this :god) but if anyone can shed any light on things it would be well appreciated - i know haywards offer porting on the renisis - my question is carl - do you guys use a set of templates - bought from a company like racing beat or do you it by eye/ have your own templates? if so how modest are your ports compared to the rb ones? also do you map the cars that you port or is the ECU capable of accomodating the bigger ports (i know they are very active in the 8 - and wondered if this is why it kinda \'fixed itself\' between 4 and 4.5 k
Do you reccon the she just needs running in a little more? i realise it takes time
im not experiencing any other problems and the car is running sweeter and sweeter with every 100 miles - ive not compression tested it just yet but will do with the oil change perhaps tomorrow! but having 0 starting problems so im not too worried (not until tonight anyway :o
anyway a couple of pics might help you visualise the ports
(http://i1117.photobucket.com/albums/k594/x3ens/IMG_0225.jpg)
(http://i1117.photobucket.com/albums/k594/x3ens/IMG_0224.jpg)
(http://i1117.photobucket.com/albums/k594/x3ens/IMG_0229.jpg)
(http://i1117.photobucket.com/albums/k594/x3ens/026-3.jpg)
(http://i1117.photobucket.com/albums/k594/x3ens/038-2.jpg)
Oh and dont hold back on any bad news or noob jokes :p- if ive done a boo boo ill just build another without the porting ;)
Nobody? Maybe I was wrong .... Should just ask them over on RX8- OC :Tongue1:rollin
The ecu has learnt to sort out the issues and will do continue to do so if given enough mileage.
Regards
Carl